﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1
{
    
    class ArrayUtil
    {
        public static void Anull()
        {
            Boolean falg;
            Console.WriteLine("请输入：");
            string a = Console.ReadLine();
            if (string.IsNullOrWhiteSpace(a))
            {
                falg = true;
            }
            else
            {
                falg = false;
            }
        }
    }

}
